Source: http://www.abarim-publications.com/Meaning/Reelaiah.html

🔼The name Reelaiah in the Bible

The name Reelaiah occurs only once in the Bible, namely in Ezra 2:2, where Reelaiah is listed among the few most prominent people who joined Zerubbabel's great return from the Babylonian exile. Also among Zerubbabel's closest companions, Nehemiah lists the same men but in stead of Reelaiah mentions Raamiah (רעמיה).

🔼Etymology of the name Reelaiah

The name Reelaiah looks like it consists of two elements, of which the final one is יה (Yah), which is an abbreviated form of the Tetragrammaton יהוה, YHWH, or Yahweh.

The first part of our name seems to derive from the verb רעל (ra'al), meaning to quiver or reel:

🔼Reelaiah meaning

For a meaning of the name Reelaiah, Jones' Dictionary of Old Testament Proper Names reads Trembling Of The Lord. Neither NOBSE Study Bible Name List nor BDB Theological Dictionary list interpretations of this name.